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采用挖壕法和红外气体分析法测定平朔煤矿安太堡露天煤矿复垦区人工刺槐林无根和有根土壤的表面CO2通量(R),确定R中异养呼吸(RH)和根系自养呼吸(RA)的贡献量及其影响因子.结果表明:R与RH具有显著的季节变化(P<0.01),RA随季节变化差异不明显(P>0.05),根呼吸贡献率(RC)呈现明显的季节变化(P<0.01),但变化趋势与R、RH相反.R和RH与温度的回归模型中,均为幂函数相关指数最高(R2=0.115,0.174;P<0.05),与水分均为线性函数相关系数最高(r=0.314,0.430;P<0.01),与温度和水分双因子均为幂函数相关指数最高(R2=0.296,0.404;P<0.05),且RH与温度、水分单因子和双因子的相关性均高于R.RH的Q10值>R的Q10值.
The surface CO2 fluxes (R) of root and rooted soils of Artificial Robinia pseudoacacia in reclamation area of Pingshuo coal mine were determined by digging trenches and infrared gas analysis, and the effects of heterotrophic respiration (RH) and root system The results showed that R and RH had significant seasonal changes (P <0.01), RA had no significant difference with the seasons (P> 0.05), and the contribution rate of root respiration (RC ) Showed a significant seasonal change (P <0.01), but the trend of change was opposite to that of R and R. In regression model of both R and RH, the power function correlation index was the highest (R2 = 0.115,0.174; P <0.05) (R = 0.314,0.430; P <0.01), and the two factors of temperature and water were the power function correlation index (R2 = 0.296,0.404; P <0.05), and the correlation between RH and temperature , The correlation between water single factor and two factors are higher than Q10 value of R.RH> R.